Validity of the self-administered food frequency questionnaire used in the 5-year follow-up survey for the JPHC Study to assess folate, vitamin B6 and B12 intake: comparison with dietary records and blood level.
published in: Journal of Epidemiology
date of publication: 2003-01-01
main subject: vitamin B12, vitamin B, vitamin B6, questionnaire, folic acid, pyridoxine
Cites articles
There is nothing here
Article - wd:Q44407655